SEGMENTED COMPONENT WITH A FIRST SHAPED PART
A segmented component for a housing includes a first shaped part, a first segment having a first cast metal region which is material-bonded to the first shaped part by a first bonding zone. The first shaped part is material-bonded to a second cast metal region of a second segment by a second bonding zone. At least one additional element is material-bonded to the second segment by a third bonding zone and material-bonded to the first segment by a fourth bonding zone, wherein the first shaped part, the first and second segments, and the at least one additional element defining an extension of an interior space of the housing in a cross-sectional plane.
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The invention relates to a segmented component according to the preamble of claim 1, a segment with a shaped part for the segmented component, a shaped part for the segmented component and a machine, in particular an electric machine which comprises the segmented component. Furthermore, the invention relates to a method for manufacturing the segmented component, and a use of the shaped part for the segmented component.
A segmented component is known from US 2004/0012284 A1 in the form of a segmented machine housing. There it is established that housing made of cast or forged metal may have minor inclusions or defects in the wall areas of the housing the remedying of which is a time-consuming and expensive process. In addition, difficulties occur during casting if deep holes with a constant cross-section are to be manufactured with precise dimensions. In such cases, it may be necessary to perform further processing steps to obtain sufficiently high precision of the dimensions. To overcome such problems, some motor housings are produced by means of extrusion. With extrusion, a block of an aluminum alloy or other metal is pushed through a die of a fixed size and shape. The dimensions produced by extrusion are more precise than with usual casting processes but manufacturing using extrusion has limitations under which it is difficult to produce a hollow extrusion with a large diameter. US 2004/0012284 A1 therefore suggests producing a multiplicity of segments with coolant channels running in a longitudinal direction by means of extrusion, casting or forging and connecting these to a housing with a large internal diameter by means of mechanical bond, a welded seam or a suitable adhesive.
In US 2004/0012284 A1, a segmented component is used for a housing of an electric machine. The electric machine comprises a stator which is fastened to an internal surface of the housing. In the aforementioned publication, the segmented component is typically a part of a housing which fixes and supports one or more bearings which receive the shaft and support the rotor in its bearing inside the stator, wherein the electric machine furthermore has bearing shields at each end of the segmented component which center and fix the shaft with the aid of the bearings.
Due to the inadequacies described, it is therefore the task of the invention to make a technical contribution with which a segmented component can be made available economically and in high quality.
The object is achieved by a segmented component with the features of claim 1.
A segmented component according to the invention comprises
-
- a first segment and a second segment,
- wherein the segmented component has a first shaped part which extends in an axial direction,
- wherein the first segment has a first cast metal region,
- wherein the second segment has a second cast metal region,
- wherein the first cast metal region is material-bonded to the first shaped part by means of a first bonding zone and the first shaped part is material-bonded to the second cast metal region by means of a second bonding zone.
The object is also achieved by a segment with a shaped part.
In a segment according to the invention with a shaped part for a segmented component according to the invention, the segment is the first segment and the shaped part the first shaped part, wherein the first cast metal region is material-bonded to the first shaped part by the first bonding zone.
The object is also achieved by a shaped part.
A shaped part according to the invention for a segmented component according to the invention is the first shaped part.
The object is also achieved by a machine, in particular an electric machine, with the features as claimed in claim 14.
A machine according to the invention, in particular an electric machine, comprises a segmented component according to the invention, wherein the machine has a stator which is frictionally fixed in the segmented component according to the invention by way of a frictional bond between at least one surface on an outer periphery of the stator and one internal surface of the segmented component for the operation of the machine.
The object is also achieved by a manufacturing method with the features as claimed in claim 15.
In a method according to the invention for manufacturing a segmented component according to the invention, the first cast metal region is material-bonded to the first shaped part by means of a first bonding zone and the second cast metal region is material-bonded to the first shaped part by means of a second bonding zone.
Furthermore, the object is also achieved by using a shaped part with the features as claimed in claim 16.
In a use according to the invention of a shaped part according to the invention for a segmented component according to the invention, the shaped part is used as the first shaped part for material-bonding of the first cast metal region to the first shaped part by means of a first bonding zone and for material-bonding of the first shaped part to the second cast metal region by means of a second bonding zone.
The object is achieved advantageously according to the invention by enabling the provision of a segmented component economically and in a high quality as a result of the material-bonding of the first segment to the first shaped part by the first bonding zone and the material-bonding of the first shaped part to the second cast metal region by the second bonding zone. Advantageously, due to their smaller size compared with the segmented component, the first and the second cast metal region can be economically manufactured with lower material and manufacturing costs in high quality by means of casting and economically material-bonded in high quality to a shaped part which is economical to produce. The cost of materials is, for example, advantageously low because the smaller size of the cast metal regions results in the manufacturing costs of the casting molds being lower. The manufacturing costs are, for example, therefore advantageously low because economically produced metal regions for economical bond of the two segments in high quality are sufficient at connection points between the first and the second segment as a result of casting.
The first cast metal region and if necessary, one or more additional cast metal regions advantageously present on a product according to the invention can be advantageously produced economically in a high quality by means of pressure die-casting. Inter alia, this is advantageous because the cast metal regions of products according to the invention may be smaller compared to a segmented component according to the invention and consequently, manufacturing with pressure die-casting is economically feasible. As a result of the advantageous feasibility of manufacturing by means of pressure die-casting, an advantageously high quality can be achieved, for example, in the dimensions, of a segmented component.
The first segment may mainly consist of the first cast metal region. Thus, economically advantageously the first segment may be cast in one piece.
The second segment may mainly consist of the second cast metal region. Thus, economically advantageously, the second segment may be cast in one piece.
The first shaped part may have a finer structure than the first cast metal region. Thus, economically advantageously, the first shaped part can be manufactured as a prefabricated part with another method using a deformation process and be made available or used for products and methods according to the invention. For products according to the invention, for example, the first and the second cast metal region may have pores or cavities as a result of casting. The finer structure of the first shaped part may have pores of a smaller size as a result of being manufactured using the other method.
The shaped part may mainly consist of one material. Thus, advantageously and economically, a piece of the material can be used as the starting point for manufacturing the first shaped part as the piece predominantly fills the volume of the first shaped part. Thus, advantageously only small amounts of additional materials or none at all must be attached to the first shaped part. Small amounts of materials may, for example, be attached during the manufacturing of the first shaped part by coating the surface of the first shaped part with an additional material.
A cross-sectional plane is spanned by a first radial direction and a second radial direction, an axial direction running vertically to the cross-sectional plane. A three-dimensional object which extends in an axial direction has many cross-sectional planes (theoretically, an infinite number) which are arranged in parallel to each another in an axial direction and in which the three-dimensional object can be variously embodied. Thus, for example, the first segment, the second segment and the first shaped part may extend in an axial direction which runs vertically to a cross-sectional plane of the segmented component. A particular cross-sectional plane has a particular axial position which can be indicated by an axial coordinate of a coordinate system which indicates the distance of the particular position in an axial direction from the origin of the coordinate system.
A segment according to the invention with a shaped part can be advantageously used for a segmented component according to the invention with the associated advantage. Also advantageously, as a result of the shaped part the segment according to the invention with the shaped part already has a first end which enables material-bonding economically in high quality to a second segment. There may, for example, be a time lag between the manufacture of a segment according to the invention with the shaped part and the manufacture of a material bond of this shaped part with the second segment, without an exposed surface at the first end of the segment according to the invention having significantly worse bonding properties with the shaped part than with the immediate manufacture of this material bond with the second segment. A segment according to the invention with a shaped part may have an additional bond point for bond to additional segments. Advantageously, apart from the shaped part for bond to the second segment, a segment according to the invention with a shaped part may have an additional shaped part at all the additional connection points to additional segments which according to the invention is material-bonded by means of a bonding zone with to a cast metal region of a segment according to the invention with a shaped part. Thus, for example, a time lag may exist between the manufacture of a segment according to the invention with the shaped part and the manufacture of material bonds at all connection points to segments without an exposed surface at the first end of the segment according to the invention having significantly worse bonding properties with the shaped part than in the immediate manufacture of these material bonds with the segments.
A shaped part according to the invention can be used advantageously for a segmented component according to the invention or a segment according to the invention with a shaped part with the associated advantages. Also advantageously, a shaped part according to the invention can be prefabricated economically in high quality independently of the manufacture of the segmented component. The prefabricated shaped parts can be stored economically advantageously and be used at an economical time for the manufacture of a segment according to the invention with a shaped part or a segmented component according to the invention.
A machine according to the invention also has the additional advantage that the stator can be frictionally fixed economically advantageously in a high quality in the segmented component by way of a frictional bond between at least one surface on the periphery of the stator and an internal surface of the segmented component for the operation of the machine. Advantageously, the machine may have a housing which comprises the segmented component.
For the operation of a machine according to the invention, the rotor is rotated around an axis of rotation and on a shaft to which the rotor is fastened mechanical energy can be released to a mechanical consumer in the form of a rotary motion. The forces occurring in the process result in counterforces in the stator which is fixed in the segmented component.
For the operation of a machine according to the invention, mechanical energy can also be supplied to the machine by way of the shaft, which also results in corresponding counterforces on the stator.
For a machine according to the invention, the shaft can be supported with the aid of a first bearing device in a first bearing shield and with the aid of a second bearing device in a second bearing shield.
A method according to the invention for manufacturing a segmented component also has the additional advantage that additional costly operations can be foregone with the method. Costly operations are, for example, welding or bonding of parts of the segmented component or the attachment of additional variously shaped extensions to the segmented component.
A shaped part according to the invention may be advantageously used with a shaped part for a segmented component according to the invention or a segment according to the invention with the associated advantages.
Advantageous embodiments of the invention are specified in the dependent claims.
Thus, an embodiment of a segmented component according to the invention is advantageous in which the first cast metal region is cast from a first material, in particular by means of pressure die-casting, and in the first bonding zone the first shaped part is fused by means of the first material. Thus, the first bonding zone can be economically advantageously produced in a high quality together with the first cast metal region.
In a further advantageous embodiment of a segmented component according to the invention, the first shaped part has a second material and the first bonding zone has an alloy wherein the alloy has the first and the second material. Thus, economically advantageously the first shaped part can be advantageously firmly bonded in a high quality to the first cast metal region.
In a further advantageous embodiment of a segmented component according to the invention the first shaped part has a third material in a region adjacent to the first bonding zone. Thus, economically advantageously in a high quality the first shaped part can be advantageously firmly bonded to the first cast metal region through the fusion of a coating on a surface of the first shaped part. A shaped part according to the invention for this embodiment has the coating. The additional material for the coating of the surface of the shaped part is the second material and the material of which the shaped part mainly consists is the third material. The coating can advantageously cover an exposed surface of the shaped part advantageously and economically in a high quality. An embodiment of a segment according to the invention with a shaped part is also accordingly advantageous, wherein the shaped part has a coated first shaped part. An embodiment of a segment according to the invention with a shaped part is also accordingly advantageous, which apart from the coated first shaped part for bond to the second segment has a respective coated additional shaped part at all the additional connection points to additional segments.
The coating methods with which conductors of a second material are provided with a coating on their surface in the patent application with the publication number EP 2396872 A1 can be used for the manufacture of the shaped part.
Economically advantageously, the same coating methods in a high quality can be used for the conductors of a cage rotor and for the shaped parts according to the invention of a segmented component for an electric machine according to the invention.
With regard to an electric machine with a cage rotor, the coated conductors used for this, and the manner in which the coating is applied to the conductors, and the associated coating methods, reference is made to the publication with the number EP 2396872 A1, the contents of which is hereby included in this application.
In a further advantageous embodiment of a segmented component according to the invention, a form closure is present between the first cast metal region and the first shaped part along a section of the first bonding zone. Thus, greater forces can be absorbed economically advantageously in a high quality between the first segment and the first shaped part without the bond between the first segment and the first shaped part being destroyed. Advantageously, a portion of the forces taking effect between the first segment and the first shaped part is absorbed by the form closure so that the material bond of the first bonding zone advantageously only has to accept a portion of the forces.
The section with the form closure may at least extend along half the length of the first bonding zone, wherein the length of the first bonding zone is measured along a transition area of the first shaped part on a side facing the first cast metal region in the cross-sectional plane. Thus, the forces acting on the form closure can be converted economically advantageously in a high quality into major compression forces which act advantageously within the first material of the first cast metal region and within the material of the first shaped part of which the first shaped part mainly consists. For this purpose, the form closure can economically advantageously have a dovetail groove in a high quality in the first cast metal region or in the first shaped part.
In a further advantageous embodiment of a segmented component according to the invention the first shaped part has a structure for the enlargement of a transition area on a side facing the first cast metal region. Thus, economically advantageously greater forces can be absorbed in a high quality between the first segment and the first shaped part as these are distributed over a larger area of the first bonding zone of the first shaped part which is bonded to the transition area of the first shaped part. To this end, the structure for enlargement of a transition area can advantageously be an easily produced grooved structure.
In a further advantageous embodiment of a segmented component according to the invention, by means of the first segment, the first shaped part, the second segment and at least one additional element the segmented component specifies an extension of an interior space of a housing in a cross-sectional plane of the housing, wherein the additional element is material-bonded to the second segment by a third bonding zone and is material-bonded to the first segment by a fourth bonding zone. Thus, two open ends of the segmented component can be advantageously and economically material-bonded in a high quality with a small casting mold by casting a cast metal region. If the at least one additional element is precisely one additional element then it consists of a second shaped part which is designed like a shaped part according to the invention. If the at least one additional element consists of several additional elements, then this consists of either a segment according to the invention with a first and a second shaped part, or an additional segmented component according to the invention with two additional shaped parts according to the invention, wherein one of the additional shaped parts according to the invention is material-bonded to the first segment by the fourth bonding zone and the second of the additional shaped parts according to the invention is material-bonded to the second segment by the third bonding zone. One of the additional shaped parts according to the invention is material-bonded to an additional segment on a first end of the additional segmented component according to the invention by a fifth bonding zone and the second of the additional shaped parts according to the invention is material-bonded to an additional segment on a second end of the additional segmented component according to the invention by a sixth bonding zone. The first end and the second end relates to an extension of the additional segmented component according to the invention in a cross-sectional plane of the additional segmented component according to the invention.
In a further advantageous embodiment of a segmented component according to the invention, the first and the second segment determine the shape of the segmented component in the cross-sectional plane between a first end and a second end of the segmented component. Thus, economically advantageously in a high quality a shaped part according to the invention can be used to manufacture variously shaped segmented components. The shaped parts can always have the same shape and the same dimensions and be advantageously produced in large quantities in a manufacturing process. Advantageously, various lengths of segmented components can be manufactured in an axial direction with the same shaped parts as the length of the shaped parts can be economically reduced accordingly in a simple manner.
In a further advantageous embodiment of a segmented component according to the invention, forces between the first and the second segment can be predominantly absorbed by the first cast metal region on the cross-sectional plane of the segmented component. Thus, a force-transferring bond can be produced economically advantageously in a high quality between the first and the second segment by casting the first cast metal region.
In a further advantageous embodiment of a segmented component according to the invention, forces between the first and the second segment are predominantly absorbed by the first shaped part on the cross-sectional plane of the segmented component. Thus, a high force-transferring bond can be economically advantageously material-bonded between the first and the second segment in a high quality by way of the first shaped part by means of the first and second bonding zone.
The first segment can only be bonded to the second segment by way of the shaped part. Thus, a force-transferring bonding quality can be economically advantageously adjusted in a high quality between the first and the second segment.
The first and the second cast metal region can overlap the first shaped part. Thus, the shaped part can be economically advantageously protected in a high quality.
In the previous description of the advantageous embodiments of a segmented component according to the invention, the part of the segmented component to which the first segment and the first bonding zone and its/their environment relate was described for the embodiments. Accordingly, the advantageous embodiments of the segmented component also describe the advantageous embodiments of a segment according to the invention with a shaped part, wherein the first segment corresponds to a segment of the segment according to the invention with a shaped part and the first shaped part corresponds to the shaped part of the segment according to the invention with a shaped part. Furthermore, a segmented component can be economically provided in high quality if the second cast metal region and the second bonding zone correspond to the first cast metal region and the first bonding zone of the described advantageous embodiments of a segmented component according to the invention.
In addition, advantageous embodiments of segmented components according to the invention, segments according to the invention with a shaped part, shaped parts according to the invention, machines according to the invention, methods according to the invention for manufacturing a segmented component, and uses according to the invention of a shaped part result advantageously from a combination of some or several described features.
The aforementioned properties, features and advantages of this invention and the way in which these are achieved become clearer and easier to understand in connection with the following description of the exemplary embodiments which are explained in more detail in connection with the figures. The figures show:
An external surface 19 and an internal surface 18 of the first segment 1 which have an extension in an axial direction 2 and an extension between the first end (at which the first shaped part 3 is located) and the second end (at which an additional shaped part 7 is located), can economically advantageously have a different shape in a high quality by means of casting, in particular by means of pressure die-casting, of the first cast metal region 4 on various cross-sectional planes of the segment 1 with the shaped part 3. The cast metal region 4 can thus have fins 36 on an external surface 19 of the segment 1.
The segmented component 20 indicates an extension of an interior space 27 of the housing 41 on the cross-sectional plane of the housing 41 by means of the first segment 1, the first shaped part 3, the second segment 21 and an additional element 26, wherein the additional element 26 is material-bonded to the second segment 21 by a third bonding zone 9 and is material-bonded to the first segment 1 by a fourth bonding zone 8. In the exemplary embodiment of the segmented component 20, the additional element 26 consists of an additional segmented component 13,15,16 and two additional shaped parts 7,14, wherein one 7 of the additional shaped parts 7,14 is material-bonded to the first segment 1 by the fourth bonding zone 8 and the second 14 of the additional shaped parts 7,14 is material-bonded to the second segment 21 by the third bonding zone 9. One 7 of the additional shaped parts 7,14 is material-bonded to an additional segment 15 by a fifth bonding zone at a first end 28 of the additional segmented components 13,15,16 and the second 14 of the additional shaped parts 7,14 is material-bonded to an additional segment 16 by a sixth bonding zone at a second end 29 of the additional segmented components 13,15,16. The first end 28 and the second end 29 relate to an extension of the additional segmented components 13,15,16 on the cross-sectional plane of the additional segmented component according to the invention 13,15,16. The first segment 1 and the second segment 21 determine the shape of the segmented component 20 on the cross-sectional plane between a first end 28 and a second end 29 of the segmented component 20 for the housing 41. All the shaped parts 3,7,13,14 of the segmented component 20, i.e. the first shaped part 3, the additional shaped part 7,14 and a shaped part of the additional segmented components 13,15,16 have the same shape and the same dimensions and were manufactured in large quantities in a manufacturing process.
Especially advantageously, an electric machine 40 can be economically advantageously provided in a high quality according to the invention. When operating the electric machine 40 as a generator, the rotor 49 is rotated by means of mechanical energy around the axis of rotation 47 which extends along the axial direction 2. By means of magnetic interaction between the rotor 49 and the stator 42, the mechanical energy can be converted into electric energy. The electric energy can be taken on a coil 50 which is fastened to the stator 42 for an electric consumer. During the operation of an electric machine 40 according to the invention as a motor, electric energy is supplied by way of the coil 50 and electric energy converted into mechanical energy by means of the magnetic interaction between the stator 42 and the rotor 49. The rotor 49 is rotated around the axis of rotation 47 and mechanical energy can be emitted on a shaft 46 to a mechanical consumer in the form of a rotary motion. The rotor 49 is fastened to the shaft 46. Advantageously, in the case of an electric machine according to the invention, the stator 42 can be economically pressed into the interior 27 of the housing 41 or the segmented component 20 in a high quality by means of the better elasticity of the first shaped part 3 with few changes to the properties of the stator 42 responsible for the magnetic interaction of the stator with the rotor. In addition, pressure die-casting can advantageously strengthen these advantages as a result of greater precision of the dimensions of the interior 27.
The stator 42 has a laminated core which comprises layered plates 56 in the axial direction 2 from a first axial end 57 to a second axial end 58 of the stator 42. The layered plates 56 in the axial direction 2 serve to guide the magnetic flow during operation of an electric machine 40. The rotor 49 has a facility to enable magnetic interaction by way of the air gap 64 with the stator 42, in particular with the coil fastened on the stator 42. In the exemplary embodiment of the electric machine 40 the facility is a shading coil which has a conductor of a second material comprising copper. The rotor 49 of the electric machine 40 is therefore a cage rotor. The first bearing shield 54 and the second bearing shield 55 are fastened at the axial ends of the segmented component 20. In the exemplary embodiments, the first bearing shield 54 and the second bearing shield 55 are fastened at the axial ends of the segmented component 20 with screws 65 as fastening elements.
A half view of the electric machine 40 from the outside can be seen below the axis of rotation 47 in
Although the invention was described in more detail by the preferred exemplary embodiments, it is not restricted by the disclosed examples and other variations can easily be derived by a person skilled in the art without departing from the scope of the invention.
Claims
1.-16. (canceled)
17. A segmented component for a housing, comprising:
- a first shaped part;
- a first segment having a first cast metal region, said first cast metal region being material-bonded to the first shaped part by a first bonding zone;
- a second segment having a second cast metal region, said first shaped part being material-bonded to the second cast metal region by a second bonding zone; and
- at least one additional element material-bonded to the second segment by a third bonding zone and material-bonded to the first segment by a fourth bonding zone,
- wherein the first shaped part, the first and second segments, and the at least one additional element define an extension of an interior space of the housing in a cross-sectional plane.
18. The segmented component of claim 17, wherein the first cast metal region is cast from a first material, said first shaped part being fused in the first bonding zone by the first material.
19. The segmented component of claim 17, wherein the first cast metal region is cast from the first material by pressure die-casting.
20. The segmented component of claim 18, wherein the first shaped part has a second material and the first bonding zone has an alloy which contains the first and second materials.
21. The segmented component of claim 20, wherein the first and second cast metal regions are made of aluminum or an aluminum alloy by pressure die-casting, said second material containing aluminum.
22. The segmented component of claim 17, wherein the first shaped part has a third material in a region adjacent to the first bonding zone.
23. The segmented component of claim 22, wherein the third material is copper.
24. The segmented component of claim 17, wherein the first cast metal region and the first shaped part are joined by a form closure along a section of the first bonding zone.
25. The segmented component of claim 17, wherein the first shaped part has a side which faces the first cast metal region and has a structure for enlargement of a transition area of the first shaped part.
26. The segmented component of claim 17, wherein the first and second segments establish a shape of the segmented component in a cross-sectional plane between first and second ends of the segmented component.
27. The segmented component of claim 17, wherein the first and second segments establish a shape of the segmented component in a cross-sectional plane between first and second ends of the segmented component through the first and second cast metal regions.
28. The segmented component of claim 17, wherein the first and second cast metal regions establish a shape of the segmented component in a cross-sectional plane of the segmented component.
29. The segmented component of claim 17, wherein the at least one additional element represents a second shaped part.
30. The segmented component of claim 17, wherein the at least one additional element includes at least one further segment, which has a cast metal region, and at least two further shaped parts.
31. A machine, comprising:
- a segmented component for a housing, said segment component including a first shaped part, a first segment having a first cast metal region, said first cast metal region being material-bonded to the first shaped part by a first bonding zone, a second segment having a second cast metal region, said first shaped part being material-bonded to the second cast metal region by a second bonding zone, and at least one additional element material-bonded to the second segment by a third bonding zone, and material-bonded to the first segment by a fourth bonding zone, wherein the first shaped part, the first and second segments, and the at least one additional element defining an extension of an interior space of the housing in a cross-sectional plane; and
- a stator frictionally fixed in the segmented component by a frictional bond between at least one surface on an outer periphery of the stator and an internal surface of the segmented component for operation of the machine.
32. A method for manufacturing a segmented component for a housing, comprising:
- material-bonding a first cast metal region of a first segment to a first shaped part of the segmented component by a first bonding zone;
- material-bonding a second cast metal region of a second segment to the first shaped part by a second bonding zone;
- connecting two open ends of the segmented component in a casting mold by a material-bond through casting of the cast metal regions; and
- material-bonding at least one additional element to the second segment by a third bonding zone and to the first segment by a fourth bonding zone such that the first and second segments, the first shaped part, and the at least one additional element define an extension of an interior space of the housing in a cross-sectional plane of the housing.
33. A method of using a shaped part for a segmented component for a housing, said method comprising:
- material-bonding the shaped part to a first cast metal region of a first segment by a first bonding zone;
- material-bonding the shaped part to a second cast metal region of a second segment by a second bonding zone; and
- material-bonding at least one additional element to the second segment by a third bonding zone and to the first segment by a fourth bonding zone such that the shaped part, the first and second segments, and the at least one additional element define an extension of an interior space of the housing in a cross-sectional plane of the housing.
Type: Application
Filed: Apr 22, 2015
Publication Date: Sep 21, 2017
Applicant: Siemens Aktiengesellschaft (München)
Inventor: Norbert WÖHNER (Heustreu)
Application Number: 15/309,702